Thanks for the details.
This seems like a muscle spasm or a cramp in the lower abdominal muscles of the right hand side.
Right hand side pain in the lower abdomen due to other conditions has accompanying symptoms like nausea, vomiting, diarrhea, loss of appetite, urinary symptoms etc. Which you do not have.
The muscle spasm takes almost 7 to 10 days to subside. This can be due to dehydration, fatigue
of the muscle, odd posture or undue stretch in the muscle or it can be due to an impinged nerve in the lower back ( which relates to the lower back pain that you had earlier).
You should put warm compresses on the area specially when you are in bed at night.
Application of an anti inflammatory liquigel like Brufen or Motrin gel should be beneficial and massaged on the area thrice daily.
You can also take an anti inflammatory pain killer like Ibuprofen 400 mg thrice a day, this is an NSAID and a potent pain killer, you can take it with water after meals.
Hope this helps.
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